Except for a few titles I've combined with the ones in my listening room, and a few others that I intend to sell, the record collection I bought last year remains in three rows of boxes on the floor of our guest room. Because that room is spacious and comfortable, and equipped with a small refrigerator and a flat-screen TV, it is also the place where my 16-year-old daughter and her friends have their slumber parties and Dr. Who marathons. Thus, as you can imagine, I must sometimes explain to our young guests the Tao of collecting records.